The shaft is supported at its ends by two bearings a and b and is subjected to the forces applied to the pulleys fixed to the shaft. the 400-n forces act in the z- direction and the 200-n and 80-n forces at in the positive y direction. the journal bearings at a and b exert only y and z components of force on the shaft. determine the normal force at d in the x-direction

current and voltage can both be different in different parts of a circuit so it matters where you place the ammeter and voltmete

mass and volume are the answers you are looking for

it is given that trillions of microbes make up to 1% to 3% of the body mass.

let's take average of this percentage: 2%

consider the average mass of the human body as 70 kg.

then, trillions of microbes would have mass  

therefore, 100 trillion micro-organisms would weigh:

this is an approximate value and could change depending on the mass of the human body and percentage of the microbes present in it.

average mass per microorganism =